This dir should contains 2 files from the UMLS:
-MRCONSO.RRF
-MRSTY.RRF
Those can be downloaded at https://www.nlm.nih.gov/research/umls/.
The use of UMLS is upon UML licence, that can be requested at
https://uts.nlm.nih.gov/uts/signup-login?_gl=1*1e91mhi*_ga*MTUzMzYyMzg5LjE2OTM1MDIzMTY.*_ga_P1FPTH9PL4*MTcxODk1MjQ4NC4yNS4xLjE3MTg5NTI4MjkuMC4wLjA.*_ga_7147EPK006*MTcxODk1MjQ4NC4yNS4xLjE3MTg5NTI4MjkuMC4wLjA.

The present files are toy examples that follow the same schema, but have been voluntarily modified.
